Abstract: The purpose of this action research was to improve the knowledge on organic agricultural practices of 79 target farmers in the Sisaket province of the Northeast Thailand. The research developed a training curriculum on organic agriculture production using a participatory learning approach. The participatory activities include field trip, knowledge sharing forum between successful farmers and targeted farmers, knowledge management and peer assist. The research results reveal that the target farmers knowledge increased significantly (p<0.01) after the participation. In addition, about 98.70% of the farmers learned the knowledge and were able to improve their farm with 62% of them shared the knowledge to their neighbors.